Fuel-burning water-heating apparatus



March 17, 1936. T J I 2,033,911

FUEL BURNING WATER HEATING APPARATUS Filed Nov. 2, 1955 ATTORNEY Patented Mar. 17, 1936 omen STATES PAT FUEL-BURNING WATER-HEATING APPARATUS Thomas Jlpigby, New York, my.

Application November 2, 1933, Serial No'. 696,356

crease water-heating efiiciency of stoves of the character specified.

Another object of my invention is to produce an oil-burning stove having a water-jacket provided with a supplemental or auxiliary waterheating or heat-transmitting element movably connected to said water-jacket.

Still another object of my invention is to provide in an oil-burning stove an auxiliary waterheating or heat-transmitting element which will function asa means and preferably an adjustable means for changing the area of the combustion chamber of an oil-burning stove so as more effectively and efiiciently to confine within such combustion chamber the products of combustion and thus to enable a greater number of units of heat to be absorbed by the water-jacket.

Another object of my invention is to provide a construction in which access to the combustion chamber will be permitted and; which under normal circumstances will so confine the products of combustion as to obtain the greatest efficiency in heating therefrom.

Still another object of my invention is to provide in a stove construction an adjustable element of the type specified by which a highly eflicient water-heater may be immediately converted into a stove capable of use as a cook stove or for heating pots and the like.

Still another object of my invention is to provide a stove construction of the type specified in which an auxiliary heat-transmitting aridwaterheating element will comprise a partition dividing and separating the usual combustion chamber into a plurality of compartments and provided with a flue opening oroutlet disposed in said element at the edge portion which is remote from and opposite to the stove flue so as to compel the products of combustion to traverse a staggered path to the stove flue.

Still another object of my invention is to provide an auxiliary heat-transmitting and waterheating partition having a hinged portion capable of being lifted automatically by excessive pressure beneath the same and also capable of being moved manually from the outside of the stove.

With these and other objects in View, the invention comprises the combination of members and arrangement of parts so combined as to coact and co-operate with each other in the performance of the functions and the accomplishment of the results herein contemplated, and comprises in one of its adaptions the species or preferred form illustrated in the accompanying drawing, in which:

Fig. 1 is a vertical section of my preferred form of a stove embodying an auxiliary heat-transmitting and water-heating element capable of separating the combustion chamber into two compartments to produce an eflicient water-heating stove and convertible into a cook stove;

Fig. 2 is a section on line 2--2 of Fig. 1 looking 5 in the direction of arrows;

Fig. 3 is a vertical section of a' modified form of water heater embodying my invention;

Fig. 4 is a section on the line 44 of Fig. 3.

Referring now to the drawing and particularly 1i) to Figs. 1 and 2 which illustrate a preferred embodiment of my invention, I indicates a cylindrical stove body provided with a door 2, a waterjacket 3, an oil-burner t, having the usual asbestos wicks 5, which are fed with oil through a 15 pipe 5, from a suitable source not shown, and the body I is provided with a flue l all of which are of conventional construction. The waterjacket 3 is in the conventional manner provided with an inlet pipe l and an outlet pipe 8. In conventional stoves of this character the stove has the usual lid 9 at the top thereof to permit the use of the stove for cooking purposes and has a combustion chamber ii) of such large area that there is provided a vast excess of air which while desirable for cooking greatly reduces the waterheating efficiency of the stove.

In accordance with the preferred form of my invention illustrated, I provide a stove of the type specified with a horizontally-disposed partition member ll functioning as a water-heating and heat-transmitting element and properly positioned in the stove or body to divide the combustion chamber into a plurality of separable compartments comprising, as shown, an upper auxiliary cooking-heat compartment l0 separable from and combinable with 'a main lower compartment Ill provided with the water-jacket 3 and which when it is desired toheat water, will properly confine the flame and cause the fuel to be burned with such reduced quantity of air as to promote the most efficient combustion and to cause the heat to be concentrated on said water-jacket, said partition furthermore transmitting heat to which it is subjected to the water-jacket and to the water therein. In accordance with said preferred form of my invention this partition member I! comprises a pair of movable semi-circular sections H, Il disposed horizontally so as to divide the normal stove combustion chamber. into two compartments of approximately equal area and said sections are arranged in a closed position to contact at their perimeters with the top of the water jacket so as to cause heat imparted thereto to be transmitted to the water-jacket and to confine the flame or products of combustion but without the usual large excess thereof necessary when a single non-variable combustion chamber is used for both cooking and water-heating.

In said preferred construction I provide one of said partition sections with a flue opening li positioned at that portion of its edge which is remote from and opposite to the flue of the stove, thus compelling the products of combustion to traverse a staggered path in order to reach said flue. In the said preferred form of my invention, the two semi-circular partition sections ll, ll are arranged to be manually adjustable from outside the stove so as to enable instantaneous conversion of the stove from an eflicient waterheating device to a cook stove for heating a pot or the like at the top of the stove, and for this purpose the two sections are pivotally mounted adjacent to their abutting diameters II and these sections as shown are mounted on shafts l2, l2 pivoted in the sides of the stove. Said two shafts l2, I2 may be geared together by gears l3, l3 to permit manual manipulation or operation and a raising of both sections simultaneously by the turning of one of the handles or knobs l4 secured to said shafts and as shown to the shaft [2, I2 or the gears may be omitted and said sections moved independently of each other.

In Figs. 3 and 4 I have shown a modified form of device having a partition l5 in which one of two flame-confining and heat-transmitting sections l5, l5 is stationary and formed integrally with or as a part of the water jacket and the other section being of reduced size and hinged to the stationary section to be swung into open and closed position in relation thereto. In these Figs. 3 and 4, the partition member similarly functions as a flame-confining and heat-transmitting element and the stationary member I5 is in the form of a transverse shelf formed integrally with a water jacket l6 and the movable section l5 is a segmental part of lesser magnitude than the shelf part and hinged at the edge thereof so as to be movable to open and closed positions respectively. A reduced combustion chamber I! is thus provided and water-heating surface is increased, heat also being transmitted by the segment l5 to the water-jacket. In the embodiment illustrated in Figs. 3 and 4, the water-jacket I 5, partition I5 are duplicated to form another chamber [1' which is separable from and combinable with the combustion chamber l1 and with a cooking-heat compartment l8 at the top of the stove; Manual control and manipulation to swing the segments l5 into closed or open position is afforded and said segmental hinged member I 5 will also provide a safety valve which will be opened automatically in case of excessive pressure in the combustion chamber.

In other respects the stove shown in Figs. 3 and 4 is similar to that shown in Figs. 1 and 2. In both constructions, I find that it is desirable to provide a doorway l9 and door 19 in the top compartments to enable a regulated amount of air to be admitted thereto, and such doorway is provided at a part of the body opposite to the flue of the stove.

Having described my invention, I claim:

1. A fuel-burning water-heating apparatus, comprising a body provided with a flame-confining combustion chamber having a flue and a liquid-fuel burning element, a water-heating element surrounding said combustion chamber, extending along the wall of the lower portion of said body to provide a ledge and defining an upper cooking-heat compartment and a lower waterheating compartment of reduced diameter, and a flame-confining element positioned within said combustion chamber, extending transversely of said water-heating element and having a portion supported by and overlapping the said ledge formed by the water-heating element, said flameconfining element extending completely across the said chamber within the flame zone to separate the said lower water-heating compartment from the said upper cooking-heat compartment and comprising a metallic plate-like member, having a part movable in relation to the ledge of the water-heating element to free the confined flame of the fuel-burning element and convert the apparatus into a cooking device.

2. A fuel-burning water-heating apparatus, comprising a body provided with a flame-confining combustion chamber having a flue and a liquid-fuel burning element, a water-heating element surrounding said combustion chamber, extending along the wall of the lower portion of said body to provide a ledge and defining an upper cooking-heat compartment and a lower water-heating compartment of reduced diameter, and a flame-confining element positioned within said combustion chamber, extending transversely of said water-heating element and having a portion supported by and overlapping the said ledge formed by the water-heating element, said flameconfining element extending completely across the said chamber within the flame zone to separate the said lower water-heating compartment from the said upper cooking-heat compartment and comprising a plurality of metallic platelike sections hinged together and one of them being movable in relation to the other, to free the confined flame of the fuel-burning element and convert the apparatus into a cooking device, and means located on the outside of the apparatus for moving said movable section.

3. A fuel-burning water-heating apparatus, comprising a body provided with a flame-confining combustion chamber having a flue and a liquid-fuel burning element, a water-heating element surrounding said combustion chamber, extending along the wall of the lower portion of said body to provide a ledge and defining an upper cooking-heat compartment and a lower waterheating compartment of reduced diameter, and a flame-confining element positioned within said combustion chamber, extending transversely of said water-heating element and having a portion supported by and overlapping the said ledge formed by the water-heating element, said flameconfining element extending completely across the said chamber within the flame zone to separate the said lower water-heating compartment from the said upper cooking-heat compartment and comprising a plurality of metallic plate-like sections both of said sections being movable from transverse to vertical positions to free the confined flame of the fuel-burning element and convert the apparatus into a cooking device, and manually-operable means extending outside of the apparatus and provided with manually-operable elements for moving said movable sections simultaneously.

THOMAS J. DIGBY. 

